CN112517976A

CN112517976A - Hole drilling machine

Info

Publication number: CN112517976A
Application number: CN202011472026.8A
Authority: CN
Inventors: 焦祥静
Original assignee: ANHUI TONGFA EQUIPMENT CO LTD
Current assignee: ANHUI TONGFA EQUIPMENT CO LTD
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-03-19
Anticipated expiration: 2040-12-14
Also published as: CN112517976B

Abstract

The invention discloses a tapping machine, wherein a drilling rod is arranged in a tube cavity of a tubular body, the drilling rod connected with a feed mechanism and a rotary driving mechanism performs circumferential rotation and axial displacement motion in a sealed cavity of the tubular body, a composite drilling tool is arranged at the end part of the drilling rod exposed at the lower end of the tubular body, the composite drilling tool comprises a drilling cutter head with a tool arranged at the edge of the tube, a positioning hole drilling tool is arranged at the center of the drilling cutter head, the cutting tool of the positioning hole drilling tool protrudes to the lower part of the cutting surface at the lower end of the drilling cutter head, the positioning hole drilling tool, the drilling cutter head and the drilling rod are arranged in the same core mode, a tube clamp or a half joint B is connected to a pipeline A to be tapped in a sealing mode, a ball valve C is connected to a tube joint on the tube clamp or the half. The operation of additionally arranging branch pipes for opening holes is ensured to be completed on line under the condition that the pipeline A to be opened is ensured to normally run and convey media.

Description

Hole drilling machine

Technical Field

The invention relates to a tapping device, in particular to a tapping device which is provided with through holes on parts such as pipelines and the like installed and on site so as to input or output media.

Background

In the prior art, pipelines and other similar components are often installed, holes need to be formed in the pipelines for connecting branches for various reasons, obviously, the holes need to be formed in the field at the moment, and how to realize the holes in the field is an urgent problem to be solved. Because the pipe fitting of waiting trompil pipeline A is great sometimes, and the pipe diameter is 300mm even bigger also very common, to the branch pipe pipeline that waits trompil pipeline A of great pipe fitting sometimes also need rather than the adaptation, the condition that the aperture of trompil is 200mm is very general. Due to the fact that the hole diameter of the drilled hole is large, a general drill bit is difficult to work, and more chip waste materials are generated during drilling, and the drill bit is obviously not suitable for being left in the pipeline A to be drilled, because the pipeline is blocked, serious safety accidents even occur, and how to take out the chip waste materials becomes a new problem.

Disclosure of Invention

The invention discloses a tapping machine which is convenient to carry, is beneficial to realizing tapping by field operation and can accurately implement positioning.

In order to achieve the purpose, the invention adopts the following technical scheme that a drilling rod is arranged in a pipe cavity of a tubular body, the drilling rod connected with a feed mechanism and a rotary driving mechanism rotates in the circumferential direction and moves in the axial direction in a sealed chamber of the tubular body, a composite drilling tool is arranged at the end part of the drilling rod exposed at the lower end of the tubular body, the composite drilling tool comprises a drilling cutter disc arranged at the edge of the drilling cutter disc, a positioning hole drilling tool is arranged at the center of the drilling cutter disc, a cutting tool of the positioning hole drilling tool protrudes to the lower part of a cutting surface at the lower end of the drilling cutter disc, the positioning hole drilling cutter, the drilling cutter disc and the drilling rod are arranged in the same core, a pipe clamp or a half joint B is connected to a pipeline A to be drilled in a sealing mode, a pipe joint on the pipe clamp or the half joint B is connected with a ball valve C or a gate valve.

According to the scheme, the composite drilling tool is used for ensuring that the positioning hole drilling tool firstly drills positioning small holes on the pipeline A to be drilled, then the drilling cutter disc performs drilling of holes with required hole diameters, and the pipeline A to be drilled is ensured to complete drilling and branch pipe adding operation on line under the condition that normal operation of conveying media is guaranteed through sealed connection among all parts.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged view of a portion of this FIG. 1;

FIGS. 3 and 4 are cross-sectional views of two embodiments at A-A in FIG. 1;

fig. 5a, 5b are schematic structural views of another embodiment.

Detailed Description

In the tapping machine shown in fig. 1, a drilling rod 20 is disposed in a tubular cavity of a tubular body 10, the drilling rod 20 connected to a feed mechanism 60 and a rotary drive mechanism 70 performs circumferential rotation and axial displacement motion in a sealed cavity of the tubular body 10, an end of the drilling rod 20 exposed at a lower end of the tubular body 10 is provided with a composite drilling tool, the composite drilling tool comprises a drilling cutter head 30 with a tool 31 disposed at a disc edge, a positioning hole drilling tool 40 is disposed at a center of the drilling cutter head 30, a cutting tool 41 of the positioning hole drilling tool 40 protrudes below a cutting surface at the lower end of the drilling cutter head 30, the positioning hole drilling tool 40, the drilling cutter head 30 and the drilling rod 20 are disposed coaxially, a pipe clamp or a hough section B is hermetically connected to a pipe to be tapped, a ball valve C is hermetically connected to a pipe joint on the pipe clamp or the hough section B, and the ball valve C is hermetically connected to.

It should be noted that the definition of the upper and lower positional relationships in the present invention is described based on the states shown in the drawings.

For the occasion with larger pipe diameter, if the pipe diameter of the pipeline A to be drilled is 300mm or even larger, and the pipe diameter of the pipe joint on the pipe clamp or the half joint B can reach 200mm, the composite drilling tool provided by the invention is utilized, namely, the positioning hole is drilled by the positioning hole drilling tool 40, and then the hole with the required aperture is drilled by the drilling cutter head 30, thereby effectively solving the practical requirements of drilling and installing branch pipelines. The pipe clamp or the half joint B is reliably and fixedly connected to the pipeline A to be perforated, a seal is established around the area to be perforated, the ball valve C is connected to the pipe joint on the pipe clamp or the half joint B in a sealing mode, the ball valve C is connected with the tubular body 10 in a sealing mode, therefore, the composite drilling tool is guaranteed to be located in a complete sealing cavity, the ball valve C is opened to enable a passage to be formed in the valve, and the tool can directly reach the pipeline A to be perforated through the ball valve C.

Preferably, the drilling cutter disc 31 is cylindrical, and the center of the cylinder top 32 of the drilling cutter disc 30 and the upper end of the positioning hole drilling tool 40 are connected with the lower end of the drill rod 20. The cylindrical shape of the drilling cutter head 31 ensures the arrangement of the drilling cutter, ensures sufficient torsion resistance when the drilling process is subjected to huge reaction torque, and reserves a space for fixing the positioning hole drilling cutter 40.

The invention aims to take out the cutting waste as much as possible, and provides a preferable scheme for taking the cutting waste, wherein a cutter body at the upper part of a cutting tool 41 of a positioning hole drilling tool 40 is provided with a one-way check claw 42, the one-way check claw 42 is radially constrained to be radially folded to be flush with the rod body of the drill rod 20 when the drill rod 20 moves downwards, and radially protruded when the radial constraint is released,

this is also the highest position of the one-way non-return dog 42 relative to the boring cutter head 30, below which position it is possible to achieve that the one-way non-return dog 42 reaches the bottom surface of the hole drilled by the pilot hole drilling tool 40, at which point the boring cutter head 30 has not yet drilled completely through the pipe wall. That is, when the drill cutter head 30 is fully drilled through the pipe wall, the one-way check finger 42 should reach the bottom surface of the hole drilled by the pilot hole drilling tool 40. The height of the one-way non-return claw 42 below the cutting face at the lower end of the drilling cutter head 30 is also acceptable, but should not be too low, so as to avoid the positioning hole drilling cutter 40 from damaging the lower pipe wall. The waste materials cut off when the hole is drilled are annular whole bodies, a few of waste chips generated by the drilling of the positioning hole drilling tool 40 are temporarily omitted, the annular waste materials cannot fall off from the positioning hole drilling tool 40 through the posture that the one-way non-return claw 42 freely and radially extends and expands in the return stroke of the drill rod 20, the annular waste materials are integrally lifted above the ball valve C along with the further lifting of the drill rod 20, the hole drilling machine is dismounted after the ball valve C is closed, and the annular waste materials are taken out.

The present invention provides three simple and reliable embodiments for the non-return pawl 42:

one is that one end of the one-way non-return claw 42 is hinged on the rod body of the positioning hole drilling tool 40, the other end is in a free state, and the free end of the one-way non-return claw 42 is overhung to the rod body outside of the positioning hole drilling tool 40 in the free state.

One end of the one-way non-return claw 42 is hinged on the shaft body of the positioning hole drilling tool 40 through a hinge shaft 43, and the upper and lower parts of the notch part on the shaft body of the positioning hole drilling tool 40 form upper and lower

limiting stops

44 and 45 which limit the rotation range of the one-way non-return claw 42.

The arrangement of the concave part provides a containing space for the one-way non-return claw 42 when being furled, ensures that the one-way non-return claw leans against the shaft body of the positioning hole drilling tool 40 when being furled, so as to ensure that the shaft body of the positioning hole drilling tool 40 avoids interfering and blocking the hole drilling operation when drilling, simultaneously, the upper concave wall surface and the lower concave wall surface of the concave part naturally form upper and lower limiting

baffles

44 and 45, the upper limiting baffle 44 ensures that the gravity center is positioned at the outer side of the articulated shaft when the one-way non-return claw 42 is furled into the shaft body section range, and in a free state only under the action of gravity, the free end of the upper concave baffle always has an outward swinging movement trend so as to realize the overhanging of the shaft body of the positioning hole drilling tool 40 when the.

Secondly, the one-way check claw 42 is an elastic sheet, the one-way check claw 42 is positioned in a concave part on the rod body of the positioning hole drilling tool 40, the lower end of the one-way check claw is fixed on the rod body of the positioning hole drilling tool 40, and the upper end of the free state extends to the outside of the rod body of the positioning hole drilling tool 40.

Thirdly, the one-way non-return claw 42 is a U-shaped or L-shaped rod, a radial through hole is formed in the rod body of the positioning hole drilling tool 40 for the bottom rod 421 of the one-way non-return claw 42 to penetrate through, the arm rod 422 of the one-way non-return claw 42 is located outside the through hole and freely swings, a groove portion is formed in the rod body of the positioning hole drilling tool 40, and the through hole is formed in the groove bottom, and the lower groove wall of the through hole is in height fit with the lower edge of the through hole. As shown in fig. 3, the shaft of the positioning hole drilling tool 40 is provided with a radial through hole, the bottom rod 421 of the U-shaped rod constituting the one-way non-return claw 42 is positioned in the through hole, the arm 422 is positioned outside the through hole, the shaft of the positioning hole drilling tool 40 is provided with a groove part to ensure that the arm can be flush with the groove bottom part and the arm 422 is completely positioned in the groove cavity when swinging upwards, so that the hole can be smoothly formed, the arm 422 falls down and is attached to the lower groove wall under the action of self-weight after passing through, and therefore, the annular waste can be lifted up in the return stroke. The situation of the L-shaped rod only needs to consider that one end of the bottom rod is provided with the anti-falling cap.

The action and effect of the one-way non-return claw 42 of the second embodiment are the same as those of the first embodiment, except that the elastic one-way non-return claw 42 is in a convex posture in a free state, in the drilling process, the one-way non-return claw 42 is restrained by the positioning hole to retract to the concave part of the rod body of the positioning hole drilling tool 40, after passing through the opened positioning hole, the one-way non-return claw 42 is restored to the convex posture by the elasticity of the one-way non-return claw, and after the drilling is finished, the one-way non-return claw 42 supports at the lower hole edge of the positioning hole of the annular waste material, so that the annular waste material is.

As a preferable aspect of the second embodiment, the upper end of the one-way check pawl 42 in the free state extends obliquely upward to the outside of the shank of the pilot hole drilling tool 40. The oblique arrangement scheme can ensure that the one-way non-return claw 42 can be timely folded in during drilling, avoid causing overlarge resistance to drilling and have reliable supporting capability in a non-return state.

In order to keep the cut posture and position of the annular waste material basically maintained for taking out, the one-way check claws 42 are arranged at intervals of 2-3 in the circumferential direction, so that the annular waste material can be guaranteed to be limited on the shaft of the pilot hole drilling tool 40 at the upper part of the one-way check claw 42 in a smooth posture.

Another aspect of the pilot hole drilling tool 40 of the present invention is to provide a location for the annular slug that is otherwise difficult to remove.

The upper end of the positioning hole drilling tool 40 is provided with a flange disc 46 extending radially outwards, the lower end of the drill rod 20 is provided with a T-shaped head 21, and the T-shaped head 21, the cylinder top 32 and the flange disc 46 are sequentially attached from top to bottom and connected through a bolt 47.

The middle part of the cylinder top 32 is provided with a positioning hole 321, and the lower end convex column 211 of the T-shaped head 21 and the short convex column 461 at the upper end of the flange 46 are inserted into the positioning hole 321 in a concentric way. The scheme not only realizes the connection of the three, but also realizes the concentric connection of the three with a very simple structure.

In view of the fact that the pipe diameter of the pipeline A to be perforated is large, in order to ensure the connection reliability and adapt to the connection of the large-size ball valve C, the invention adopts the following preferred connection scheme, the lower end of the pipeline tubular body 10 is provided with a connecting ring 50, the upper end surface of the connecting ring 50 is detachably connected with the lower end surface of the tubular body 10 through bolts, and the lower end of the connecting ring 50 is provided with a threaded hole 51 which is connected with a flange plate of the ball valve C through bolts. The connecting ring 50 is a transition piece, and only one specification of the tapping machine is needed, so that the ball valves C with various specifications can be adapted and additionally installed.

Claims

1. A tapping machine, the lumen of the tubular body (10) has drilling rods (20), the drilling rods (20) connected with a feed mechanism (60) and a rotary driving mechanism (70) do circumferential rotation, axial displacement movement in the sealed chamber of the tubular body (10), characterized in that: the end part of a drill rod (20) exposed at the lower end of the tubular body (10) is provided with a composite drilling tool, the composite drilling tool comprises a drilling cutter head (30) arranged at the edge of the drill rod (31), the center of the drilling cutter head (30) is provided with a positioning hole drilling tool (40), a cutting tool (41) of the positioning hole drilling tool (40) protrudes to the lower part of the cutting surface at the lower end of the drilling cutter head (30), the positioning hole drilling tool (40), the drilling cutter head (30) and the drill rod (20) are arranged in the same core, a pipe clamp or a half joint B is connected to the pipeline A to be drilled in a sealing mode, a pipe joint on the pipe clamp or the half joint B is connected with a ball valve C in a sealing mode, and the ball valve C is connected with.

2. The tapping machine as claimed in claim 1, wherein: the drilling cutter head (31) is cylindrical, and the center part of the cylinder top (32) of the drilling cutter head (30) and the upper end of the positioning hole drilling cutter (40) are connected with the lower end of the drill rod (20).

3. Tapping machine as claimed in claim 1 or 2, characterized in that: the cutter body at the upper part of the cutting knife (41) of the positioning hole drilling cutter (40) is provided with a one-way check claw (42), and the one-way check claw (42) is radially constrained to be radially folded to be flush with the rod body of the drill rod (20) when moving downwards along with the drill rod (20); when the one-way check claw (42) is higher than the height of the cutting surface at the lower end of the drilling cutter head (30), the height difference between the one-way check claw (42) and the cutting surface at the lower end of the drilling cutter head (30) is smaller than the height difference between the highest position and the lowest position of the edge of the hole.

4. The tapping machine as claimed in claim 3, wherein: one end of the one-way non-return claw (42) is hinged on the rod body of the positioning hole drilling tool (40), the other end of the one-way non-return claw is in a free state, and the free end of the one-way non-return claw (42) is suspended outside the rod body of the positioning hole drilling tool (40) in the free state.

5. The tapping machine as claimed in claim 3, wherein: one end of the one-way non-return claw (42) is hinged on the shaft body of the positioning hole drilling tool (40) through a hinge shaft (43), and the upper part and the lower part of the notch part on the shaft body of the positioning hole drilling tool (40) form an upper limiting stopper and a lower limiting stopper (44, 45) which limit the rotation range of the one-way non-return claw (42).

6. The tapping machine as claimed in claim 3, wherein: the one-way check claw (42) is an elastic sheet, the one-way check claw (42) is positioned in a concave part on the rod body of the positioning hole drilling tool (40), the lower end of the one-way check claw is fixed on the rod body of the positioning hole drilling tool (40), and the upper end of the free state extends to the outside of the rod body of the positioning hole drilling tool (40).

7. The electric tapping machine as claimed in claim 3, wherein: the one-way non-return claw (42) is a U-shaped or L-shaped rod, a radial through hole is formed in the rod body of the positioning hole drilling tool (40) and used for a bottom rod (421) of the one-way non-return claw (42) to penetrate through, an arm rod (422) of the one-way non-return claw (42) is located outside the through hole and freely swings, a groove portion is formed in the rod body of the positioning hole drilling tool (40), the through hole is formed in the groove bottom, and the lower groove wall of the through hole is in height fit with the lower edge of the through hole.

8. The tapping machine as claimed in claim 6, wherein: the upper end of the one-way check claw (42) in the free state extends to the oblique upper part of the outside of the shaft of the positioning hole drilling tool (40).

9. The tapping machine as claimed in claim 3, wherein: the unidirectional non-return claws (42) are arranged at intervals of 2-3 in the circumferential direction.

10. Tapping machine as claimed in claim 1 or 2, characterized in that: the upper end of the positioning hole drilling tool (40) is provided with a flange disc (46) extending radially, the lower end of the drill rod (20) is provided with a T-shaped head (21), and the T-shaped head (21), the cylinder top (32) and the flange disc (46) are sequentially attached from top to bottom and connected through a bolt (47).

11. The tapping machine as claimed in claim 9, wherein: a positioning hole (321) is formed in the middle of the cylinder top (32), and a lower convex column (211) of the T-shaped head (21) and a short convex column (461) at the upper end of the flange disc (46) are inserted into the positioning hole (321) together.

12. The tapping machine as claimed in claim 1, wherein: the lower end of the tubular body (10) is provided with a connecting ring (50), the upper end surface of the connecting ring (50) is detachably connected with the lower end surface of the tubular body (10) through bolts, and the lower end of the connecting ring (50) is provided with a threaded hole (51) which is connected with a flange plate of the ball valve C through bolts.